Title page for ETD etd-04132009-150141

The Influence of Emotion on the Risk Perception and Situation Awareness of Clinicians

Degree

PhD

Department

Industrial and Systems Engineering

Advisory Committee

Advisor Name

Title

Smith-Jackson, Tonya L.

Committee Co-Chair

Winchester, Woodrow W. III

Committee Co-Chair

Hudlicka, Eva

Committee Member

Kleiner, Brian M.

Committee Member

Quek, Francis K. H.

Committee Member

Keywords

Situation Awareness

Emotion

Health Care

Human-Computer Interaction

Anthropomorphic Computer Character

Risk Perception

Decision Making

Date of Defense

2009-03-27

Availability

unrestricted

Abstract

The objective of this exploratory research was to investigate the interplay among emotion, risk perception, and situation awareness as potential risk factors within the health care domain. To accomplish this objective, a two-phase study approach was employed. In Phase I, a proof-of-concept testbed of the emotional interface concept, namely Wearable Avatar Risk Display (WARD), was tested as the primary communication medium to explore participants' emotional responses and risk choices under the influence of the validated International Affective Picture System (IAPS). Based on the lessons learned, a limited prototype of WARD was further refined and then implemented in a formative evaluation. The formative evaluation employed two medical students from the Edward Via Virginia College of Osteopathic Medicine (VCOM) to investigate their emotional response, risk perception, and situation awareness using the MicroSim InHospital under the influence of the validated film-based Mood Induction Procedures (MIPs). In Phase II, 32 new medical students from VCOM participated in 2 (intervention) x 2 (film) between-subjects study for addressing three research questions. Both quantitative and qualitative data were collected and analyzed.

Results from Phase I indicated the need for MIPs, as well as shed light on the feasibility of employing anthropomorphic computer characters as intervention devices. Participants found anthropomorphic computer characters to be meaningful as virtual assistants in a team environment. The Facial Expression Coding System also indicated that participants experienced high levels of happiness/amusement when a happy and credible anthropomorphic computer character was introduced under angry emotional induction via MIPs. Physiological states results confirmed that participants' heart rate variability was affected significantly after the use of anthropomorphic computer characters, verifying that their utilization was potentially effective. The lessons I learned from the Phase I results led me to refine procedures and training/evaluation techniques, and to introduce anthropomorphic computer characters with minimal intrusiveness during the Phase II study.

Findings from Phase II showed that one particular medical item, wiping contaminated spills, was found to be influenced by induced anger. Moreover, mixed support for using anthropomorphic computer characters and text interventions was also found for the medical and general risk perception ratings under induced anger. Sub-constructs within 3-D SART correlated with emotional responses and anthropomorphic computer character intervention. Two additional items, supply of attention and complexity of the situation, were also found to be influenced by anthropomorphic computer character intervention. Content analysis using the Word-Frequency List method resulted in positive responses for both anthropomorphic computer character and text interventions. Using Two-sample t tests, text based interventions led to a higher level of subjective happiness as measured by PANAS-X. Multiple regressions were also conducted and resulted in six equations for predicting the influence of emotion on situation awareness and medical based risk perception.